Icom IC-F4261DT Service Manual

Contents

Icom IC-F4261DT Service Manual Manual pdf 59 page image

5 - 6ADJUSTMENT TRANSCEIVER’SCONDITION OPERATIONADJUST-MENTITEMVALUETX OUTPUTPOWER(Hi power)1 • Channel : 1-8• Transmitting• Connect an RF power meter to the an-tenna connector. [Power (Hi)]5 W(L2 power) 2 • Channel : 1-9• Transmitting[Power (L2)] 2 W(L1 power) 3 • Channel : 1-10• Transmitting [Power (L1)] 1 WMODULATIONBALANCE1 • Channel : 1-11• Transmitting whileholding down [P0].• Set [MOD N] to “80.” [MOD N] 802 • Connect a modulation analyzer with anoscilloscope to the antenna connector,through an attenuator, and set it as;HPF : OFFLPF : 20 kHzDe-emphasis : OFFDetector : (P–P)/2[BAL (Narrow)]Square waveformNo over or under shoot.As flat as possible.FM DEVIATION- Narrow mode -(band center)1 • Channel : 1-12• Transmitting• Connect an audio generator to the exter-nal MIC terminal, and then set it as;Frequency : 1 kHzWaveform : Sin waveLevel : 150 mVrms• Connect a modulation analyzer to the an-tenna connector, through an attenuator.[MOD N C]±2.05 to ±2.15kHz(band low) 2 • Channel : 1-13• Transmitting [MOD N L](band high) 3 • Channel : 1-14• Transmitting [MOD N H]- Middle mode -(band center)4 † • Channel : 1-15• Transmitting [MOD M C] ±3.20 to ±3.30kHz(band low) 5† • Channel : 1-16• Transmitting [MOD M L](band high) 6 † • Channel : 1-17• Transmitting [MOD M H]- Wide mode -(band center)7‡ • Channel : 1-18• Transmitting [MOD W C] ±4.05 to ±4.15kHz(band low) 8 ‡ • Channel : 1-19• Transmitting [MOD W L](band high) 9‡ • Channel : 1-20• Transmitting [MOD W H]DIGITALDEVIATION( Band center)1 • Channel : 1-21• Transmitting• Set [Dig Mode] to “7.” [Dig Mode] 72 • Connect a modulation analyzer to the an-tenna connector, through an attenuator. [MOD D C] ±1.35 to ±1.39kHz(Band low) 3 • Channel : 1-22• Transmitting [MOD D L](Band high) 4 • Channel : 1-23• Transmitting [MOD D H]CTCSS/DTCSDEVIATION1 • Channel : 1-24• Transmitting• Connect a modulation analyzer to the an-tenna connector, through an attenuator.[CTCSS/DTCS]±0.33 to 0.37 kHzTONE DEVIATION 1 • Channel : 1-25• Transmitting whileholding down [P3].• Connect a modulation analyzer to the an-tenna connector, through an attenuator. [S.Tone]±1.50 kHzTRANSMIT ADJUSTMENTS1) Select an adjustment item using [↑]/[↓] on the PC's keyboard.2) Set or modify the adjustment value as specifi ed using [←]/[→] on the PC's keyboard, and then push [ENTER].*: [Low band] **: [High band] ***: [350 MHz band] †: For only [EUR] ‡: For except [USA]